8644521311 has 2 divisors, whose sum is σ = 8644521312. Its totient is φ = 8644521310.

The previous prime is 8644521247. The next prime is 8644521377. The reversal of 8644521311 is 1131254468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8644521311 - 2⁶ = 8644521247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8644523311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4322260655 + 4322260656.

It is an arithmetic number, because the mean of its divisors is an integer number (4322260656).

Almost surely, 2^8644521311 is an apocalyptic number.

8644521311 is a deficient number, since it is larger than the sum of its proper divisors (1).

8644521311 is an equidigital number, since it uses as much as digits as its factorization.

8644521311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 8644521311 is about 92975.9179088865. The cubic root of 8644521311 is about 2052.3290056809.

Adding to 8644521311 its reverse (1131254468), we get a palindrome (9775775779).

The spelling of 8644521311 in words is "eight billion, six hundred forty-four million, five hundred twenty-one thousand, three hundred eleven".